3406E wont start

Hi All,

New to forum. Read a few posts and looks to be some good talent here!

Here's my problem (among outrageous fuel costs):
99 Sterling 3406e wont start. Bought truck 2 mos ago, it's been in our shop for paint, etc. Drove truck about 50 miles when purchased it. No problems on startup or driveability, actually ran good. The other day, brought it inside, changed oil and fuel filters w/ Luberfiner. Truck started and ran good. Put 30 gals diesel in it. Ran about 30 mins or so around town. Came back to shop, everything OK. Before I sut it off, I noticed that the tach was a bit lazy. Rev it up and it was slightly slow on reading RPMs. Didnt notice if it ever did it before. Shut off engine. Came back 2 days later and wont start. Turns over....thats it.
Here is where it gets fuzzy:
Thought it may be fuel related. Looked in tank and fuel was real cloudy. Drained and rinsed tank. Added new fuel(from different station). Changed filters. Primed..Primed ..Primed..etc. Wont start. Pulled off suction line from tank. Put it in 5 gal pail clean fuel. Return line into another 5 gal bucket, turned motor over for 15 seconds or so fuel on return was slightly cloudy, but cleared up after a gal or so. So I think the fuel quality problem is fixed. Hooked up fuel lines, primed, still wont start. Read a couple of other posts...talked to mechanic friend says maybe cam speed sensor..changed the cam speed sensor. still wont start.
Not many competent cat engine guys around, but the nearest one came out with his scan tool and found no fault codes or bad sensors. still wont start. He didnt have an answer except maybe ecm is bad. Scan tool didnt show that. Nearest cat dealer is + 1 hr away. Called the service dept in hopes that someone could at least point me in a direction. No help.
Also...checked all fuses, wires, harness, etc. Nothing broke or disconnected. The odd thing is the truck ran fine until I shut it off then nothing. I realize this is kinda vague but I'm desperate at this point.
Any help would be greatly appreciated !!
G

 

Thanks for reply.

Please forgive me. First electronic engine. What is Cat ET ?

 

One update to earlier post.

Looked at a few other threads...
The "stop engine" light comes on when key is first turned on, then it goes off. The "check engine" light used to come on and go off (I noticed it ) but now it does not come on at all.

 

Thanks for the replys

One of my guys did weld a bracket onto the side of the frame.

The tach shows no rpm on cranking. No wires were disconnected other than the cam sensor (I'm Positive the cam sensor is connected correctly)
BTW the new cam sensor is the sealed type. They said install without the shim. Cyl head never came off engine.

Old fuel did have some coolant in the bottom of tank. I do think the injector cups need to looked at, but that shouldnt make it not start. I did the fuel into a bucket thing. Both supply and return into different buckets. Still wont start.